clark



(No Model.) 3 Sheets-Sheet 1.

W. CLARK.

PHOTOGRAPHIG GAMERA.

No. 314,317. Patented Mar. 24, 1885.

INVENTOR BY Mm 7% ATTORNEYS WITNESSES (No Model.) 7 3 Sheets-Sheet 2.

W. CLARK.

- PHOTOGRAPHIG CAMERA. No. 314,317. Patented Mar. 24, 1885.

WITNESS/13L v Y Z INVBNTOR: I

v ATTORNEYS.

3 Sheets-Sheet 3.

W. CLARK.

PHOTOGRAPHIO CAMERA.

(No Model.)

Patented Mar 24, 1885 INV EN TOR 9%&w/

L/MLf/IA/M, v22,

ATTORNEYS.

WITNESSES PATENT @EETQE.

IVALTER CLARK, OF NE\V YORK, N. Y.

PHOTOGRAPHIC CAMERA.

.IBPECIFZCATION f Application filed Augu t 15, lF-S l.

To all whom it 71mg conceive:

Be it known that I, \VALTER CLARK, ot' the city, county, and State of NewYork, have invented certain new and useful Improvements in Photographer Oameras,of which the follow ing is a full, clear, and exact description.

My invention relates tocameras having separate apertures for exposure and focusing and fixed objectglasses separate from the plateholders, whereby the removal and replacing of the plate-holder is not necessary in order to obtain a focus.

It consists in a rotating lens holder which is combined with a camera-box of the construction named, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figurel is a vertical section ofthc improved camera on the objective plane. Fig. 2 is a cross-section of the camera. Fig. 3 is a side elevation. and Fig. 4 is a. horizontal section. Fig. 5 is a section similar to Fig. 1, and Fig. 6 is a horizontal section showingaslnitter applied to the box.

A is the box provided with a partition. (1, that formsa lens and focusing-chamber at the front end of the box, separate from the back space.

In the hinged front of the box is an aperture, Z), and coincident therewith in partition to is an opening, 0, both openings 2) 0 being in line with the rear opening that is covered by plate-holder B.

In the bottom ofthe lenschamber is an opening, (2, and at the top is the objectglass 0, fitted over an opening in the box.

D is the lens-holder, preferably a solid cylinder bored transversely to receive the lenstubef. The holder is supported by a divided shaft, 9 g, the inner end, of which is sustained by a stand, 71, while the longer end 9 of the shaft extends through the side of box A, and is provided with a Wheel, 2', for turning the shaft and holder. The portion 9 of the shaft is tubular, and through it passes a shaft, is, that carries on its end within holder D a pinion, Z, which engages a rack on tube f, whereby the tube can be moved in the holder,

5; part of Letters Patent No. 31%,317, dated March 24., 1835.

(No model.).

and the lens thus adjusted to obtain a focus. The position of holder D in the chamber is between the apertures b v, and also between the aperture (1 and glass 6, so that by a quarterturn the opening through the holder can be brought into position for either focusing or exposure. The partition a is shaped at the sides of aperture 1) to receive or lap upon the side of the holder, as shown in Fig. 1, and, as shown in Fig. 6, there are also flanges on the partition taking over the ends of the holder. Thatconstruction is to exclude light entirely from the aperture 1), except what passes through the lens.

On the end y of the shaft is a spiral spring, q, connected at its end to the stand it and the shaft, so that it tends to turn the holder D in the direction to bringthe lensto the aperture 0.

On the outside of the boxis a trigger, 1', which engagesa notch in wheel i, for retaining the holder with the lens to the aperture (Z.

In order to balance the holder D it is fitted with a sliding weight, s having teeth engaged by the pinion I, so that as the pinion moves the lenstube in one direction the weight 8 is projected in the opposite direction.

At the bottom of the box A is a mirror, at, pivoted at one end between flanges n by pivots that enter grooves 0 in the flanges, so that the mirror can be shut up closclyaud when opened can be drawn forward beneath aperture d. The mirror is connected to side arms, p, attached to the front of the box, for supporting the mirror at an angle of fortyfive degrees. These arms fold up with the mirror.

To obtain a focus, the mirror is let down, the lens-holder turned to bring its aperture in line with aperture (Z and glass 0, and the lenstube then adjusted until the objectis properly focused on the glass. The trigger r is then raised to release the holder,and the spring instantly acts to bring the holder in line with apertures b c, and the image is thrown on the plate in holder B.

At t is shown a shutter of usual construction for instantaneous work. This is to be re leased after the lens-holder is set for exposure, or the shutter may be released by the holder.

In Figs. 5 and 6, a shutter, i, is shown as applied between thelcns-holder D and partition a, and hung by arms a on the shaft 9 g.

ICO

On the shaftis aspiral spring, to, connected shaft 7;, and pinion Z, combined with box A to rotate the shutter and the latter is held up over the aperture 0 by a spring-catch, 8. When the holder D is turned to position for taking a picture,its projection s releases catch 8, and the shutter flies around until it covers the aperture 1), thus opening the apertures for a moment. The shutter is broughtback by pin, 9', on the holdenwhen the latter is turned again.

Having thus described my inventioml claim and desire to secure by Letters Patent- 1. In a camera provided with separate foeusingchamber, a lensholder of cylindrical form fitted to rotate so as to bring its aperture in line with either the objeetglass or the ex' posnre-apcrtures, substantially as described.

2. In a photographic camera having a partition forming a separate i'iieusing-chamber, a lens-holder fitted closely in an aperture in the partition, so as to exclude light and arranged to rotate in its seat; substantially as described.

3. The rotating holder D, tube f, shaft gg,

and partition a, substantially as described.

-1l-. Thelens-holderD,shai'tgg. spring q, and trigger '1, combined with eamerabox A, sub stantially as described.

The combination of cylindrical lensholder D and box A, having partitions a, formed to lap upon the ends and side of the holder, substantially as described.

6. In combination with a photographic camera, the mirror m,hung by pivots entering grooves o in flanges on box A, substantially as described.

'7. The sliding weight 5 combined with the lens-tube]; holder 1), and pinion as and for the purpose specified. i

8. The rotary shutter '6, combined with rotary lcnslioldcr l), and box A having apertnred partition a. substantially as described, or operation as specified.

\VALTER CLARK.

Vi'itnesses:

(J. Sandwich. EDVFAR'D M. Gnu-2K. 

